Handle returned by Dispatcher.beginUiOngoing() for driving an ongoing invoker from a UI control (color picker, slider).
Dispatcher.beginUiOngoing()
update(params)
InvocationCtx
onMove
end(reason)
onEnd(ctx, reason)
Readonly
Optional
Handle returned by
Dispatcher.beginUiOngoing()for driving an ongoing invoker from a UI control (color picker, slider).update(params)rebuilds anInvocationCtxwith the new params and calls the handle'sonMove. Safe to call many times.end(reason)callsonEnd(ctx, reason)once and removes the handle from the in-flight map. Idempotent — further calls are no-ops.